Home / 30,835.28-42,508.19-20,206.46

Finding the Fourth Proportional to 30,835.28, 42,508.19 and 20,206.46

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Solution

The fourth proportional to 30,835.28, 42,508.19 and 20,206.46 is: 27,855.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,835.28 : 42,508.19 = 20,206.46 : x
  2. Step 2: Convert to fraction form
    30,835.28/42,508.19 = 20,206.46/x
  3. Step 3: Cross multiply
    30,835.28x = 42,508.19 × 20,206.46
  4. Step 4: Simplify right side
    30,835.28x = 858,940,197.69
  5. Step 5: Solve for x
    x = 858,940,197.69/30,835.28
  6. Step 6: Final answer
    x = 27,855.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.